May 17 » Greek archaeologist Valerios Stais discovers the Antikythera mechanism, an ancient mechanical analog computer.
May 31 » Second Boer War: The Treaty of Vereeniging ends the war and ensures British control of South Africa.
August 9 » Edward VII and Alexandra of Denmark are crowned King and Queen of the United Kingdom of Great Britain and Ireland.
August 22 » Cadillac Motor Company is founded.
August 22 » Theodore Roosevelt becomes the first President of the United States to make a public appearance in an automobile.
November 21 » The Philadelphia Football Athletics defeated the Kanaweola Athletic Club of Elmira, New York, 39–0, in the first ever professional American football night game.
Day of death March 23, 1903
The temperature on March 23, 1903 was between 8.5 °C and 20.0 °C and averaged 14.1 °C. There was 10.4 hours of sunshine (84%). Source: KNMI
January 4 » Topsy, an elephant, is electrocuted by the owners of Luna Park, Coney Island. The Edison film company records the film Electrocuting an Elephant of Topsy's death.
May 29 » In the May Coup, Alexander I, King of Serbia, and Queen Draga, are assassinated in Belgrade by the Black Hand (Crna Ruka) organization.
June 16 » Roald Amundsen leaves Oslo, Norway, to commence the first east–west navigation of the Northwest Passage.
July 23 » The Ford Motor Company sells its first car.
August 29 » The Slava, the last of the five Borodino-class battleships, is launched.
November 18 » The Hay–Bunau-Varilla Treaty is signed by the United States and Panama, giving the United States exclusive rights over the Panama Canal Zone.
When copying data from this family tree, please include a reference to the origin: Tijs van den Brink, "Parentele of Geurt Jacobs", database, Genealogy Online (https://www.genealogieonline.nl/geurt-jacobs/I99837.php : accessed February 16, 2026), "Jannes Doppenberg (1902-1903)".
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